Writers: where do you get stuck between first draft and published book?

Hi everyone, I'm Mykyta, one of the two people behind AIWriteBook. We launch here on November 24.

Before that, I'd love to hear from people who write or want to write a book. Where does it stall for you? Is it starting, keeping one voice across 60,000 words, editing, the cover, or formatting for KDP and EPUB?

We built AIWriteBook around those exact walls, and the answers here will decide what we polish before launch. Tell me yours and I'll reply to every comment.